MC68HC908JB8JDW Freescale Semiconductor, MC68HC908JB8JDW Datasheet - Page 237

• Manufacturer Part Number: MC68HC908JB8JDW
• Description: IC MCU 8K FLASH 3MHZ 20-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JB8JDW

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 3MHz
• Connectivity: USB
• Peripherals: LVD, POR, PWM
• Number Of I /o: 13
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

Technical Data — MC68HC908JB8•MC68HC08JB8•MC68HC08JT8
15.1 Contents
15.2 Introduction
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
Freescale Semiconductor
Section 15. Computer Operating Properly (COP)
15.2
15.3
15.4
15.4.1
15.4.2
15.4.3
15.4.4
15.4.5
15.4.6
15.4.7
15.4.8
15.5
15.6
15.7
15.8
15.8.1
15.8.2
15.9
The computer operating properly (COP) module contains a free-running
counter that generates a reset if allowed to overflow. The COP module
helps software recover from runaway code. Prevent a COP reset by
clearing the COP counter periodically. The COP module can be disabled
through the COPD bit in the CONFIG register.
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 237
Interrupts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .238
I/O Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
COP Control Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 241
Monitor Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .241
COP Module During Break Mode . . . . . . . . . . . . . . . . . . . . . . 242
Computer Operating Properly (COP)
OSCXCLK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .239
STOP Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 239
COPCTL Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .239
Power-On Reset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Internal Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
Reset Vector Fetch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
COPD (COP Disable). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
COPRS (COP Rate Select) . . . . . . . . . . . . . . . . . . . . . . . . 240
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .242
Stop Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .242
Technical Data
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